Docs: Remove trailing whitespace

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index af9da690d6efb56507888a4cd7e5a62e93e56897..2d29b17c89d2c852fa172f61138d3461cb2a1c24 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -6060,7 +6060,7 @@ address_pipe:
 .endd
 This transport is used for handling deliveries to pipes that are generated by
 redirection (aliasing or users' &_.forward_& files). The &%return_output%&
-option specifies that any output on stdout or stderr generated by the pipe is to 
+option specifies that any output on stdout or stderr generated by the pipe is to
 be returned to the sender.
 .code
 address_file:
@@ -9265,9 +9265,9 @@ Upper case and lower case letters are synonymous in header names. If the
 following character is white space, the terminating colon may be omitted, but
 this is not recommended, because you may then forget it when it is needed. When
 white space terminates the header name, this white space is included in the
-expanded string.  If the message does not contain the given header, the 
-expansion item is replaced by an empty string. (See the &%def%& condition in 
-section &<<SECTexpcond>>& for a means of testing for the existence of a 
+expanded string.  If the message does not contain the given header, the
+expansion item is replaced by an empty string. (See the &%def%& condition in
+section &<<SECTexpcond>>& for a means of testing for the existence of a
 header.)
 
 If there is more than one header with the same name, they are all concatenated
@@ -22699,7 +22699,7 @@ See the &%timeout_defer%& option for how timeouts are handled.
 .cindex "&(pipe)& transport" "logging output"
 If this option is set, and the status returned by the command is
 one of the codes listed in &%temp_errors%& (that is, delivery was deferred),
-and any output was produced on stdout or stderr, the first line of it is 
+and any output was produced on stdout or stderr, the first line of it is
 written to the main log.