Add more tests for x expression markers

TODO.txt

@@ -1,5 +1,4 @@
 0.4
-- Rething syntax of `rew x` expression prefixes `:#`.
 - Better shell specific examples for `rew x` + cleanup and reorder all `rew x` examples.
 - Add `REW_PREFIX` env var to enforce stderr prefix over detecting it from argv[0]?
 - Refactor and split `x.rs` into multiple files.

docs/reference/rew-x.md

@@ -254,7 +254,7 @@ rew x '{!seq 1 3}. {}'
 </div>
 </div>
 
-The `#` marker makes the rest of the expression to be interpreted by the current shell.
+The `#` marker denotes "raw shell expression". Everything after it will be interpreted by the current shell.
 
 For example, the following expression is equivalent to `{sh -c 'printf "%s\n" a b c'}`
 

src/commands/x.rs

@@ -89,7 +89,8 @@ pub const META: Meta = command_meta! {
            input: &["first", "second", "third"],
            output: &["1. first", "2. second", "3. third"],
        },
-       "The `#` marker makes the rest of the expression to be interpreted by the current shell.\n\n\
+       "The `#` marker denotes \"raw shell expression\". \
+        Everything after it will be interpreted by the current shell.\n\n\
         For example, the following expression is equivalent to `{sh -c 'printf \"%s\\n\" a b c'}`": {
             args: &["{# printf '%s\\n' a b c}. {}"],
             input: &["first", "second", "third"],

src/pattern.rs

@@ -556,10 +556,18 @@ mod tests {
     #[case("{:# n1|n2}", "{:#`n1|n2`}")]
     #[case("{ :#n1|n2}", "{`:#n1`|`n2`}")] // :# is part for command name
     #[case("{ :# n1|n2}", "{`:#` `n1`|`n2`}")] // :# is separate command
+    #[case("{: #n1|n2}", "{:`#n1`|`n2`}")] // # is part for command name
+    #[case("{: # n1|n2}", "{:`#` `n1`|`n2`}")] // # is separate command
+    #[case("{ : #n1|n2}", "{`:` `#n1`|`n2`}")] // : is separate command, # is part of its argument
+    #[case("{ : # n1|n2}", "{`:` `#` `n1`|`n2`}")] // : is separate command, # is its argument
     #[case("{#:n1|n2}", "{#`:n1|n2`}")] // : is part of shell command
     #[case("{#: n1|n2}", "{#`: n1|n2`}")] // : is part of shell command
     #[case("{ #:n1|n2}", "{`#:n1`|`n2`}")] // #: is part for command name
     #[case("{ #: n1|n2}", "{`#:` `n1`|`n2`}")] // #: is separate command
+    #[case("{# :n1|n2}", "{#`:n1|n2`}")] // : is part for command name
+    #[case("{# : n1|n2}", "{#`: n1|n2`}")] // : is separate command
+    #[case("{ # :n1|n2}", "{`#` `:n1`|`n2`}")] // # is separate command, : is part of its argument
+    #[case("{ # : n1|n2}", "{`#` `:` `n1`|`n2`}")] // # is separate command, : is its argument
     // Escaping - General
     #[case("%%", "%")]
     #[case("%n", "\n")]