*config.txt: stick to camelCase naming convention

This should improve readability. Compare "thislongname" and
"thisLongName". The following keys are left in unchanged. We can
decide what to do with them later.

 - am.keepcr
 - core.autocrlf .safecrlf .trustctime
 - diff.dirstat .noprefix
 - gitcvs.usecrlfattr
 - gui.blamehistoryctx .trustmtime
 - pull.twohead
 - receive.autogc
 - sendemail.signedoffbycc .smtpsslcertpath .suppresscc

Helped-by: Eric Sunshine <[email protected]>
Signed-off-by: Nguyễn Thái Ngọc Duy <[email protected]>
Signed-off-by: Eric Sunshine <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pclouds

Documentation/CodingGuidelines

@@ -526,7 +526,7 @@ Writing Documentation:
  `backticks around word phrases`, do so.
    `--pretty=oneline`
    `git rev-list`
-   `remote.pushdefault`
+   `remote.pushDefault`
 
  Word phrases enclosed in `backtick characters` are rendered literally
  and will not be further expanded. The use of `backticks` to achieve the

Documentation/blame-options.txt

@@ -4,7 +4,7 @@
 
 --root::
 	Do not treat root commits as boundaries.  This can also be
-	controlled via the `blame.showroot` config option.
+	controlled via the `blame.showRoot` config option.
 
 --show-stats::
 	Include additional statistics at the end of blame output.