The Git CodingGuidelines prefer the $(...) construct for command
substitution instead of using the backquotes `...`.

The backquoted form is the traditional method for command
substitution, and is supported by POSIX.  However, all but the
simplest uses become complicated quickly.  In particular, embedded
command substitutions and/or the use of double quotes require
careful escaping with the backslash character.

The patch was generated by:

for _f in $(find . -name "*.sh")
do
	perl -i -pe 'BEGIN{undef $/;} s/`(.+?)`/\$(\1)/smg'  "${_f}"
done

and then carefully proof-read.

Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-gui 0.20.0

* tag 'gitgui-0.20.0' of http://repo.or.cz/r/git-gui:
  git-gui: set version 0.20
  git-gui: sv.po: Update Swedish translation (547t0f0u)
  git-gui i18n: Updated Bulgarian translation (547t,0f,0u)
  git-gui: Makes chooser set 'gitdir' to the resolved path
  git-gui: Fixes chooser not accepting gitfiles
  git-gui: reinstate support for Tcl 8.4
  git-gui: fix problem with gui.maxfilesdisplayed
  git-gui: fix verbose loading when git path contains spaces.
  git-gui/gitk: Do not depend on Cygwin's "kill" command on Windows
  git-gui: add configurable tab size to the diff view
  git-gui: Make git-gui lib dir configurable at runime
  git-gui i18n: Updated Bulgarian translation (520t,0f,0u)
  L10n: vi.po (543t): Init translation for Vietnamese
  git-gui: align the new recursive checkbox with the radiobuttons.
  git-gui: Add a 'recursive' checkbox in the clone menu.

* git://repo.or.cz/git-gui:
  git-gui: tolerate major version changes when comparing the git version
  git-gui: show staged submodules regardless of ignore config

* jl/use-vsatisfy-correctly-for-2.0:
  git-gui: tolerate major version changes when comparing the git version

git-gui 0.19.0

* tag 'gitgui-0.19.0' of http://repo.or.cz/r/git-gui:
  git-gui 0.19
  git-gui: chmod +x po2msg, windows/git-gui.sh
  git-gui: fallback right pane to packed widgets with Tk 8.4
  git-gui i18n: Added Bulgarian translation
  git-gui l10n: Add 29 more terms to glossary
  git-gui i18n: Initial glossary in Bulgarian

* git://repo.or.cz/git-gui:
  git-gui: correct spelling errors in comments
  git-gui: add menu item to launch a bash shell on Windows.
  git-gui: corrected setup of git worktree under cygwin.
  git-gui: right half window is paned
  git-gui: Add gui.displayuntracked option
  git-gui: show the maxrecentrepo config option in the preferences dialog
  git-gui: added gui.maxrecentrepo to extend the number of remembered repos
  git-gui: Improve font rendering on retina macbooks

git-gui 0.18.0

* tag 'gitgui-0.18.0' of git://repo.or.cz/git-gui:
  git-gui 0.18
  git-gui: avoid an error message when removing the last remote
  git-gui: fix file name handling with non-empty prefix
  git-gui: bring wish process to front on Mac
  git-gui: change dialog button positions for Windows to suit platform.
  git-gui: allow "\ No newline at end of file" for linewise staging
  git-gui: fix the mergetool launcher for the Beyond Compare tool.
  Makefile: replace "echo 1>..." with "echo >..."
  French translation: copy -> copie.
  git-gui: Fix parsing of <rev> <path-which-not-present-in-worktree>

git-gui 0.17.0

* tag 'gitgui-0.17.0' of git://repo.or.cz/git-gui:
  git-gui 0.17
  git-gui: Don't prepend the prefix if value looks like a full path
  git-gui: Detect full path when parsing arguments
  git-gui: remove .git/CHERRY_PICK_HEAD after committing
  git-gui: Fix a loose/lose mistake
  git-gui: Fix semi-working shortcuts for unstage and revert
  git-gui: de.po: translate "remote" as "extern"
  git-gui: de.po: translate "bare" as "bloß"
  git-gui: de.po: consistently add untranslated hook names within braces
  git-gui: preserve commit messages in utf-8
  git-gui: open console when using --trace on windows
  git-gui: fix a typo in po/ files
  git-gui: Use PWD if it exists on Mac OS X
  git-gui: fix git-gui crash due to uninitialized variable

* 'master' of git://repo.or.cz/git-gui: (28 commits)
  git-gui 0.16
  git-gui: handle shell script text filters when loading for blame.
  git-gui: Set both 16x16 and 32x32 icons on X to pacify Xming.
  git-gui: added config gui.gcwarning to disable the gc hint message
  git-gui: set whitespace warnings appropriate to this project
  git-gui: don't warn for detached head when rebasing
  git-gui: make config gui.warndetachedcommit a boolean
  git-gui: add config value gui.diffopts for passing additional diff options
  git-gui: sort the numeric ansi codes
  git-gui: support underline style when parsing diff output
  git-gui: fix spelling error in sshkey.tcl
  git-gui: include the file path in guitools confirmation dialog
  git-gui: span widgets over the full file output area in the blame view
  git-gui: use a tristate to control the case mode in the searchbar
  git-gui: set suitable extended window manager hints.
  git-gui: fix display of path in browser title
  git-gui: enable the smart case sensitive search only if gui.search.smartcase is true
  git-gui: catch invalid or complete regular expressions and treat as no match.
  git-gui: theme the search and line-number entry fields on blame screen
  git-gui: include the number of untracked files to stage when asking the user
  ...

* git://repo.or.cz/git-gui:
  git-gui: incremental goto line in blame view
  git-gui: clear the goto line input when hiding
  git-gui: only accept numbers in the goto-line input
  git-gui: search and linenumber input are mutual exclusive in the blame view
  git-gui: deal with unknown files when pressing the "Stage Changed" button
  git-gui: drop the 'n' and 'Shift-n' bindings from the last patch.
  git-gui: Add keyboard shortcuts for search and goto commands in blame view.
  git-gui: Enable jumping to a specific line number in blame view.
  Fix tooltip display with multiple monitors on windows.
  Fix typo: existant->existent
  git-gui: updated translator README for current procedures.
  git-gui: warn when trying to commit on a detached head
  git-gui: Corrected a typo in the Swedish translation of 'Continue'