[flang] Document support for CONVERT= extension.

Original-commit: flang-compiler/f18@a4674f074354fbfb169d6402b0afec411c769b2a
Reviewed-on: https://github.com/flang-compiler/f18/pull/48

diff --git a/flang/documentation/extensions.md b/flang/documentation/extensions.md
index 7207234..e4862b6 100644 (file)
--- a/flang/documentation/extensions.md
+++ b/flang/documentation/extensions.md
@@ -39,6 +39,7 @@ Extensions, deletions, and legacy features supported
 * Data edit descriptors without width or other details
 * Backslash escape character sequences in quoted character literals
 * `D` lines in fixed form as comments or debug code
+* `CONVERT=` on the OPEN statement
 
 Extensions and legacy features deliberately not supported
 ---------------------------------------------------------