Replace filepattern with pathspec for consistency

pathspec is the most widely used term, and is the one defined in
gitglossary.txt. <filepattern> was used only in the synopsys for git-add
and git-commit, and in git-add.txt. Get rid of it.

This patch is obtained with by running:

  perl -pi -e 's/filepattern/pathspec/' `git grep -l filepattern`
Signed-off-by: NMatthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/git-add.txt

@@ -11,7 +11,7 @@ SYNOPSIS
 'git add' [-n] [-v] [--force | -f] [--interactive | -i] [--patch | -p]
 	  [--edit | -e] [--all | [--update | -u]] [--intent-to-add | -N]
 	  [--refresh] [--ignore-errors] [--ignore-missing] [--]
-	  [<filepattern>...]
+	  [<pathspec>...]
 
 DESCRIPTION
 -----------
@@ -49,7 +49,7 @@ commit.
 
 OPTIONS
 -------
-<filepattern>...::
+<pathspec>...::
 	Files to add content from.  Fileglobs (e.g. `*.c`) can
 	be given to add all matching files.  Also a
 	leading directory name (e.g. `dir` to add `dir/file1`
@@ -100,20 +100,20 @@ apply to the index. See EDITING PATCHES below.
 
 -u::
 --update::
-	Only match <filepattern> against already tracked files in
+	Only match <pathspec> against already tracked files in
 	the index rather than the working tree. That means that it
 	will never stage new files, but that it will stage modified
 	new contents of tracked files and that it will remove files
 	from the index if the corresponding files in the working tree
 	have been removed.
 +
-If no <filepattern> is given, default to "."; in other words,
+If no <pathspec> is given, default to "."; in other words,
 update all tracked files in the current directory and its
 subdirectories.
 
 -A::
 --all::
-	Like `-u`, but match <filepattern> against files in the
+	Like `-u`, but match <pathspec> against files in the
 	working tree in addition to the index. That means that it
 	will find new files as well as staging modified content and
 	removing files that are no longer in the working tree.

builtin/add.c

@@ -16,7 +16,7 @@
 #include "bulk-checkin.h"
 
 static const char * const builtin_add_usage[] = {
-	N_("git add [options] [--] <filepattern>..."),
+	N_("git add [options] [--] <pathspec>..."),
 	NULL
 };
 static int patch_interactive, add_interactive, edit_interactive;

builtin/commit.c

@@ -31,12 +31,12 @@
 #include "sequencer.h"
 
 static const char * const builtin_commit_usage[] = {
-	N_("git commit [options] [--] <filepattern>..."),
+	N_("git commit [options] [--] <pathspec>..."),
 	NULL
 };
 
 static const char * const builtin_status_usage[] = {
-	N_("git status [options] [--] <filepattern>..."),
+	N_("git status [options] [--] <pathspec>..."),
 	NULL
 };