dialyzer: Update documentation

1 files changed, 36 insertions, 27 deletions

diff --git a/lib/dialyzer/src/dialyzer_cl_parse.erl b/lib/dialyzer/src/dialyzer_cl_parse.erl
index 2f9e577544..5ca7599b35 100644
--- a/lib/dialyzer/src/dialyzer_cl_parse.erl
+++ b/lib/dialyzer/src/dialyzer_cl_parse.erl
@@ -329,7 +329,7 @@ help_warnings() ->
 
 help_message() ->
   S = "Usage: dialyzer [--help] [--version] [--shell] [--quiet] [--verbose]
-		[-pa dir]* [--plt plt] [--plts plts] [-Ddefine]*
+		[-pa dir]* [--plt plt] [--plts plt*] [-Ddefine]*
                 [-I include_dir]* [--output_plt file] [-Wwarn]*
                 [--src] [--gui | --wx] [files_or_dirs] [-r dirs]
                 [--apps applications] [-o outfile]
@@ -340,13 +340,13 @@ Options:
   files_or_dirs (for backwards compatibility also as: -c files_or_dirs)
       Use Dialyzer from the command line to detect defects in the
       specified files or directories containing .erl or .beam files,
-      depending on the type of the analysis
+      depending on the type of the analysis.
   -r dirs
       Same as the previous but the specified directories are searched
       recursively for subdirectories containing .erl or .beam files in
-      them, depending on the type of analysis
+      them, depending on the type of analysis.
   --apps applications
-      Option typically used when building or modifying a PLT as in:
+      Option typically used when building or modifying a plt as in:
         dialyzer --build_plt --apps erts kernel stdlib mnesia ...
       to conveniently refer to library applications corresponding to the
       Erlang/OTP installation. However, the option is general and can also
@@ -355,51 +355,60 @@ Options:
         dialyzer --apps inets ssl ./ebin ../other_lib/ebin/my_module.beam
   -o outfile (or --output outfile)
       When using Dialyzer from the command line, send the analysis
-      results to the specified \"outfile\" rather than to stdout
+      results to the specified outfile rather than to stdout.
   --raw
       When using Dialyzer from the command line, output the raw analysis
       results (Erlang terms) instead of the formatted result.
       The raw format is easier to post-process (for instance, to filter
-      warnings or to output HTML pages)
+      warnings or to output HTML pages).
   --src
       Override the default, which is to analyze BEAM files, and
-      analyze starting from Erlang source code instead
+      analyze starting from Erlang source code instead.
   -Dname (or -Dname=value)
-      When analyzing from source, pass the define to Dialyzer (**)
+      When analyzing from source, pass the define to Dialyzer. (**)
   -I include_dir
-      When analyzing from source, pass the include_dir to Dialyzer (**)
+      When analyzing from source, pass the include_dir to Dialyzer. (**)
   -pa dir
       Include dir in the path for Erlang (useful when analyzing files
-      that have '-include_lib()' directives)
+      that have '-include_lib()' directives).
   --output_plt file
-      Store the plt at the specified file after building it
+      Store the plt at the specified file after building it.
   --plt plt
       Use the specified plt as the initial plt (if the plt was built 
-      during setup the files will be checked for consistency)
-  --plts plts
-      Merges the specified plts to create the initial plt -- requires
+      during setup the files will be checked for consistency).
+  --plts plt*
+      Merge the specified plts to create the initial plt -- requires
       that the plts are disjoint (i.e., do not have any module
-      appearing in more than one plt)
+      appearing in more than one plt).
+      The plts are created in the usual way:
+        dialyzer --build_plt --output_plt plt_1 files_to_include
+        ...
+        dialyzer --build_plt --output_plt plt_n files_to_include
+      and then can be used in either of the following ways:
+        dialyzer files_to_analyze --plts plt_1 ... plt_n
+      or:
+        dialyzer --plts plt_1 ... plt_n -- files_to_analyze
+      (Note the -- delimiter in the second case)
   -Wwarn
       A family of options which selectively turn on/off warnings
-      (for help on the names of warnings use dialyzer -Whelp)
+      (for help on the names of warnings use dialyzer -Whelp).
   --shell
-      Do not disable the Erlang shell while running the GUI
+      Do not disable the Erlang shell while running the GUI.
   --version (or -v)
-      Prints the Dialyzer version and some more information and exits
+      Print the Dialyzer version and some more information and exit.
   --help (or -h)
-      Prints this message and exits
+      Print this message and exit.
   --quiet (or -q)
-      Makes Dialyzer a bit more quiet
+      Make Dialyzer a bit more quiet.
   --verbose
-      Makes Dialyzer a bit more verbose
+      Make Dialyzer a bit more verbose.
   --build_plt
       The analysis starts from an empty plt and creates a new one from the
       files specified with -c and -r. Only works for beam files.
       Use --plt(s) or --output_plt to override the default plt location.
   --add_to_plt
       The plt is extended to also include the files specified with -c and -r.
-      Use --plt(s) to specify wich plt to start from, and --output_plt to
+      Use --plt(s) to specify which plt to start from, and --output_plt to
       specify where to put the plt. Note that the analysis might include
       files from the plt if they depend on the new files.
       This option only works with beam files.
@@ -408,24 +417,24 @@ Options:
       from the plt. Note that this may cause a re-analysis of the remaining
       dependent files.
   --check_plt
-      Checks the plt for consistency and rebuilds it if it is not up-to-date.
+      Check the plt for consistency and rebuild it if it is not up-to-date.
       Actually, this option is of rare use as it is on by default.
   --no_check_plt (or -n)
       Skip the plt check when running Dialyzer. Useful when working with
       installed plts that never change.
   --plt_info
-      Makes Dialyzer print information about the plt and then quit. The plt
+      Make Dialyzer print information about the plt and then quit. The plt
       can be specified with --plt(s).
   --get_warnings
-      Makes Dialyzer emit warnings even when manipulating the plt. Only 
-      emits warnings for files that are actually analyzed.
+      Make Dialyzer emit warnings even when manipulating the plt. Warnings
+      are only emitted for files that are actually analyzed.
   --dump_callgraph file
       Dump the call graph into the specified file whose format is determined
       by the file name extension. Supported extensions are: raw, dot, and ps.
       If something else is used as file name extension, default format '.raw'
       will be used.
   --no_native (or -nn)
-      Bypass the native code compilation of some key files that dialyzer
+      Bypass the native code compilation of some key files that Dialyzer
       heuristically performs when dialyzing many files; this avoids the
       compilation time but it may result in (much) longer analysis time.
   --gui