This means that the trimmed _<key>_ and _<value>_ will be separated by
"`:`{nbsp}" (one colon followed by one space).
-For convenience, a _<key-alias>_ can be configured to make using `--trailer`
-shorter to type on the command line. This can be configured using the
-`trailer.<key-alias>.key` configuration variable. The _<key-alias>_ must be a prefix
-of the full _<key>_ string, although case sensitivity does not matter. For
-example, if you have
-
-------------------------------------------------
-trailer.sign.key "Signed-off-by: "
-------------------------------------------------
-
-in your configuration, you only need to specify `--trailer="sign: foo"`
-on the command line instead of `--trailer="Signed-off-by: foo"`.
-
By default the new trailer will appear at the end of all the existing
trailers. If there is no existing trailer, the new trailer will appear
at the end of the input. A blank line will be added before the new
non-whitespace lines before a line that starts with `---` (followed by a
space or the end of the line).
+For convenience, a _<key-alias>_ can be configured to make using `--trailer`
+shorter to type on the command line. This can be configured using the
+`trailer.<key-alias>.key` configuration variable. The _<key-alias>_ must be a prefix
+of the full _<key>_ string, although case sensitivity does not matter. For
+example, if you have
+
+------------------------------------------------
+trailer.sign.key "Signed-off-by: "
+------------------------------------------------
+
+in your configuration, you only need to specify `--trailer="sign: foo"`
+on the command line instead of `--trailer="Signed-off-by: foo"`.
+
When reading trailers, there can be no whitespace before or inside the
_<key>_, but any number of regular space and tab characters are allowed
between the _<key>_ and the separator. There can be whitespaces before,