1 files changed, 43 insertions, 8 deletions

diff --git a/Documentation/CodingGuidelines b/Documentation/CodingGuidelines
index 0ddd36879a..a4191aa388 100644
--- a/Documentation/CodingGuidelines
+++ b/Documentation/CodingGuidelines
@@ -206,11 +206,38 @@ For C programs:
 		x = 1;
 	}
 
-   is frowned upon.  A gray area is when the statement extends
-   over a few lines, and/or you have a lengthy comment atop of
-   it.  Also, like in the Linux kernel, if there is a long list
-   of "else if" statements, it can make sense to add braces to
-   single line blocks.
+   is frowned upon. But there are a few exceptions:
+
+	- When the statement extends over a few lines (e.g., a while loop
+	  with an embedded conditional, or a comment). E.g.:
+
+		while (foo) {
+			if (x)
+				one();
+			else
+				two();
+		}
+
+		if (foo) {
+			/*
+			 * This one requires some explanation,
+			 * so we're better off with braces to make
+			 * it obvious that the indentation is correct.
+			 */
+			doit();
+		}
+
+	- When there are multiple arms to a conditional and some of them
+	  require braces, enclose even a single line block in braces for
+	  consistency. E.g.:
+
+		if (foo) {
+			doit();
+		} else {
+			one();
+			two();
+			three();
+		}
 
  - We try to avoid assignments in the condition of an "if" statement.
 
@@ -526,12 +553,20 @@ Writing Documentation:
  modifying paragraphs or option/command explanations that contain options
  or commands:
 
- Literal examples (e.g. use of command-line options, command names, and
- configuration variables) are typeset in monospace, and if you can use
- `backticks around word phrases`, do so.
+ Literal examples (e.g. use of command-line options, command names,
+ branch names, configuration and environment variables) must be
+ typeset in monospace (i.e. wrapped with backticks):
    `--pretty=oneline`
    `git rev-list`
    `remote.pushDefault`
+   `GIT_DIR`
+   `HEAD`
+
+ An environment variable must be prefixed with "$" only when referring to its
+ value and not when referring to the variable itself, in this case there is
+ nothing to add except the backticks:
+   `GIT_DIR` is specified
+   `$GIT_DIR/hooks/pre-receive`
 
  Word phrases enclosed in `backtick characters` are rendered literally
  and will not be further expanded. The use of `backticks` to achieve the