Highlighting issue with quoted string literal

[Alizter]

Describe the bug

The following OCaml code causes a highlighting leak:

 let man =
    [ `S "DESCRIPTION"
    ; `P
        {|$(b,dune fmt) runs the formatter on the source code. The formatter is automatically selected. ocamlformat is used to format OCaml source code (*.ml and *.mli files) and refmt is used to format Reason source code (*.re and *.rei files).|}
    ; `Blocks Common.help_secs
    ]

Expected behaviour

The string escape characters {| |} shouldn't be interfered by a following $.

Related discussion

Additional notes

[Alhadis]

The string escape characters {| |} shouldn't be interfered by a following $.

The $ doesn't appear to be causing the issue. From a cursory glance of the grammar, there doesn't appear to be a rule that matches {| |} constructs (I'm guessing it's a more recent feature of OCaml?) Assuming that the intended effect is for |…| to highlight its contents as a verbatim string (à la, Python's r"…" syntax), then I recommend adding something to the effect of the following diff:

ocaml.tmbundle.1.diff

diff --git a/Syntaxes/OCaml.plist b/Syntaxes/OCaml.plist
index c28d2ed..6fbc203 100644
--- a/Syntaxes/OCaml.plist
+++ b/Syntaxes/OCaml.plist
@@ -17,6 +17,27 @@
 	<string>OCaml</string>
 	<key>patterns</key>
 	<array>
+		<dict>
+			<key>name</key><string>string.interpolated.ocaml</string>
+			<key>begin</key><string>\\|</string>
+			<key>end</key><string>\\|</string>
+			<key>beginCaptures</key>
+			<dict>
+				<key>0</key>
+				<dict>
+					<key>name</key>
+					<string>punctuation.definition.string.begin.ocaml</string>
+				</dict>
+			</dict>
+			<key>endCaptures</key>
+			<dict>
+				<key>0</key>
+				<dict>
+					<key>name</key>
+					<string>punctuation.definition.string.end.ocaml</string>
+				</dict>
+			</dict>
+		</dict>
 		<dict>
 			<key>captures</key>
 			<dict>

(I don't know a single thing about OCaml, and it probably shows…)

[Alizter]

@Alhadis Yes that is exactly it!

[Alizter]

In fact, there are some pull requests implementing this already: https://github.com/textmate/ocaml.tmbundle/pull/17/files

It's just that the activity on this repo is non-existent.