Make line length, wrapping and spacing consistent

doc_src/test.txt

@@ -12,11 +12,17 @@ and 1 if false. An expression is made up of one or more operators
 and their arguments.
 
 The following operators are available to examine files and directories:
+
 - `-b FILE` returns true if `FILE` is a block device.
+
 - `-c FILE` returns true if `FILE` is a character device.
+
 - `-d FILE` returns true if `FILE` is a directory.
+
 - `-e FILE` returns true if `FILE` exists.
+
 - `-f FILE` returns true if `FILE` is a regular file.
+
 - `-g FILE` returns true if `FILE` has the set-group-ID bit set.
 - `-G FILE` returns true if `FILE` exists and has the same group ID
 as the current user.
@@ -24,12 +30,19 @@ as the current user.
 - `-O FILE` returns true if `FILE` exists and is owned by the current
 user.
 - `-p FILE` returns true if `FILE` is a named pipe.
+
 - `-r FILE` returns true if `FILE` is marked as readable.
+
 - `-s FILE` returns true if the size of `FILE` is greater than zero.
+
 - `-S FILE` returns true if `FILE` is a socket.
+
 - `-t FD` returns true if the file descriptor `FD` is a terminal (TTY).
+
 - `-u FILE` returns true if `FILE` has the set-user-ID bit set.
+
 - `-w FILE` returns true if `FILE` is marked as writable; note that this does not check if the filesystem is read-only.
+
 - `-x FILE` returns true if `FILE` is marked as executable.
 
 The following operators are available to compare and examine text strings:
@@ -38,14 +51,21 @@ The following operators are available to compare and examine text strings:
 - `STRING1 != STRING2` returns true if the strings `STRING1` and
 `STRING2` are not identical.
 - `-n STRING` returns true if the length of `STRING` is non-zero.
+
 - `-z STRING` returns true if the length of `STRING` is zero.
 
 The following operators are available to compare and examine numbers:
+
 - `NUM1 -eq NUM2` returns true if `NUM1` and `NUM2` are numerically equal.
+
 - `NUM1 -ne NUM2` returns true if `NUM1` and `NUM2` are not numerically equal.
+
 - `NUM1 -gt NUM2` returns true if `NUM1` is greater than `NUM2`.
+
 - `NUM1 -ge NUM2` returns true if `NUM1` is greater than or equal to `NUM2`.
+
 - `NUM1 -lt NUM2` returns true if `NUM1` is less than `NUM2`.
+
 - `NUM1 -le NUM2` returns true if `NUM1` is less than or equal to `NUM2`.
 
 Note that only integers are supported. For more complex mathematical
@@ -53,7 +73,9 @@ operations, including fractions, the `env` program may be useful. Consult the
 documentation for your operating system.
 
 Expressions can be combined using the following operators:
+
 - `COND1 -a COND2` returns true if both `COND1` and `COND2` are true.
+
 - `COND1 -o COND2` returns true if either `COND1` or `COND2` are true.
 
 Expressions can be inverted using the `!` operator:
@@ -61,6 +83,7 @@ Expressions can be inverted using the `!` operator:
 `EXPRESSION` is true.
 
 Expressions can be grouped using parentheses.
+
 - `( EXPRESSION )` returns the value of `EXPRESSION`.
 Note that parentheses will usually require escaping with `\\(` to avoid
 being interpreted as a command substitution.
@@ -95,6 +118,7 @@ if test \( -f /foo -o -f /bar \) -a \( -f /baz -o -f /bat \)
 end.
 \endfish
 
+
 \subsection test-standards Standards
 
 `test` implements a subset of the