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-rw-r--r--runtime/syntax/rnoweb.vim4
1 files changed, 2 insertions, 2 deletions
diff --git a/runtime/syntax/rnoweb.vim b/runtime/syntax/rnoweb.vim
index b2ba17d68d..749860a3fe 100644
--- a/runtime/syntax/rnoweb.vim
+++ b/runtime/syntax/rnoweb.vim
@@ -33,8 +33,8 @@ syn cluster texParaGroup add=@rnoweb
" Highlighting of R code using an existing r.vim syntax file if available {{{1
syn include @rnowebR syntax/r.vim
-syn region rnowebChunk matchgroup=rnowebDelimiter start="^<<.*>>=" matchgroup=rnowebDelimiter end="^@" contains=@rnowebR,rnowebChunkReference,rnowebChunk fold keepend
-syn match rnowebChunkReference "^<<.*>>$" contained
+syn region rnowebChunk matchgroup=rnowebDelimiter start="^\s*<<.*>>=" matchgroup=rnowebDelimiter end="^@" contains=@rnowebR,rnowebChunkReference,rnowebChunk fold keepend
+syn match rnowebChunkReference "^\s*<<.*>>$" contained
syn region rnowebSexpr matchgroup=Delimiter start="\\Sexpr{" matchgroup=Delimiter end="}" contains=@rnowebR contained
" Sweave options command {{{1