Fixes after review

Author: koutcher

README.adoc

@@ -25,6 +25,10 @@ Resources
 
 Bugs and Feature Requests
 -------------------------
+Please check out the
+https://github.com/jonas/tig/blob/master/TROUBLESHOOTING.adoc[troubleshooting guide]
+if you are experiencing issues with Tig.
+
 Bugs and feature requests can be reported using the
 https://github.com/jonas/tig/issues[issue tracker] or by mail to either
 the Git mailing list or directly to the maintainer. Ensure that the word

TROUBLESHOOTING.adoc

@@ -52,9 +52,11 @@ tic -x -o "$HOME/.terminfo" -e screen terminfo.src
 Note that macOS still comes with and old version of ncurses (5.7) which
 may not work well with newer 256-color terminfo entries.
 
-Note that while Putty identifies itself by default as `xterm`, it is
+Note that while PuTTY identifies itself by default as `xterm`, it is
 not fully compatible with it. If you have problems with the keyboard
-mapping (e.g. Home/End), try to use `putty` instead.
+mapping (e.g. Home/End), try to use `putty` instead. Check out
+https://invisible-island.net/xterm/xterm.faq.html#known_bugs[XTerm FAQ]
+for more details and information on other terminal emulators.
 
 LANG
 ~~~~
@@ -63,12 +65,15 @@ The `LANG` variable must be set in accordance with your terminal
 encoding settings. If the `LANG` variable is not properly set,
 accented characters will be distorted.
 
-To check that your locale is present in the list of available locales,
-use `locale -a | grep "$LANG"`.
+Use `locale -a` to check if your `LANG` variable is present in the
+list of available locales (on Linux, you may find that `UTF-8` has
+been substituted for `utf8` but they are equivalent).
 
 Note that the ability to set the `LANG` variable to values such as
 `en_DE` with KDE does not infer their validity.
 
+Also check the `LC_ALL` variable as it has precedence over `LANG`.
+
 ESCDELAY
 ~~~~~~~~