doctests: Rename `desc' etc. in extract-doctest from `rubric'

[subdirmk.git] / README

diff --git a/README b/README
index 7de4def345f95bdfa39f6da34992be894b22e11f..d750cb8e6daa40c7a6baf84f95bcdf6e699cd402 100644 (file)
--- a/README
+++ b/README
@@ -254,7 +254,7 @@ So pathname syntax is a subset of:
 &&             =>      &&              for convenience in shell runes
 
 &\&            =>      &               general escaping mechanism
-&\$            =>      $
+&\$            =>      $               provided for $-doubling regimes
 &\NEWLINE                              eats the newline and vanishes
 
 &$VARIABLE     =>      $(sub_dir_VARIABLE)     or $(TOP_VARIABLE)
@@ -323,6 +323,25 @@ So pathname syntax is a subset of:
        `all' is extra special: every directory has an `all'
        target, which corresponds to &TARGETS.
 
+
+Dollar doubling and macro assistance
+------------------------------------
+
+&$+            Starts dollar-doubling
+&$-            Stops dollar-doubling
+       Both are idempotent and local to the file or context.
+
+While dollar-doubling:
+- - - - - - - - - - -
+
+$      =>      $$      including $'s produced by other
+                        &-expansions not mentioned here
+
+&\$    =>      $
+&$NN   =>      $(NN)   where N are digits
+&$(    =>      $(
+
+
 Subdirectory and variable naming
 --------------------------------