manual: fix trivial grammar errors.

[Ralf Wildenhues]

This fixes the stuff found with the regexes from
<http://lists.gnu.org/archive/html/autoconf-patches/2009-04/msg00067.html>
while avoiding the question how 'FAQ' is pronounced.

Pushed to master, will backport to branch-1-10 as applicable.

Cheers,
Ralf

    manual: fix trivial grammar errors.
    
    * doc/automake.texi (Subpackages, Vala Support, Java)
    (Checking the Distribution, Timeline): Fix `a' vs. `an' errors
    and duplicate `the'.
    Report by Eric Blake.

diff --git a/doc/automake.texi b/doc/automake.texi
index fcbee63..324649d 100644
--- a/doc/automake.texi
+++ b/doc/automake.texi
@@ -4431,7 +4431,7 @@ AC_CONFIG_SUBDIRS, Configuring Other Packages in 
Subdirectories,
 autoconf, The Autoconf Manual}).
 
 Here is an example package for an @code{arm} program that links with
-an @code{hand} library that is a nested package in subdirectory
+a @code{hand} library that is a nested package in subdirectory
 @file{hand/}.
 
 @code{arm}'s @file{configure.ac}:
@@ -6634,7 +6634,7 @@ There are a few variables that are used when compiling 
Vala sources:
 
 @vtable @code
 @item VALAC
-Path to the the Vala compiler.
+Path to the Vala compiler.
 
 @item VALAFLAGS
 Additional arguments for the Vala compiler.
@@ -7473,7 +7473,7 @@ The value of this variable is passed to the @option{-d} 
option to
 @code{javac}.  It defaults to @samp{$(top_builddir)}.
 
 @item CLASSPATH_ENV
-This variable is an @code{sh} expression that is used to set the
+This variable is a shell expression that is used to set the
 @env{CLASSPATH} environment variable on the @code{javac} command line.
 (In the future we will probably handle class path setting differently.)
 @end vtable
@@ -8368,8 +8368,8 @@ your Makefiles cause some distributed files to be rebuilt 
when the user
 build the package.  (Think about the user missing the tool required to
 build the file; or if the required tool is built by your package,
 consider the cross-compilation case where it can't be run.)  There is
-a FAQ entry about this (@pxref{distcleancheck}), make sure you read it
-before playing with @code{distcleancheck_listfiles}.
+an entry in the FAQ about this (@pxref{distcleancheck}), make sure you
+read it before playing with @code{distcleancheck_listfiles}.
 
 @code{distcheck} also checks that the @code{uninstall} rule works
 properly, both for ordinary and @code{DESTDIR} builds.  It does this
@@ -11937,7 +11937,7 @@ package has 30 pages of documentation, and 38 test 
cases.
 From now on and until version 1.4, new releases will occur at a rate
 of about one a year.  1.1 did not exist, actually 1.1b to 1.1p have
 been the name of beta releases for 1.2.  This is the first time
-Automake uses suffix letters to designate beta releases, an habit that
+Automake uses suffix letters to designate beta releases, a habit that
 lasts.
 
 @item 1996-10-10 Kevin Dalley packages Automake 1.0 for Debian GNU/Linux.