docs: fix minor typo (#3311)

c9bbf8d2 · Philipp Bucher · Henry Schreiner · 6be64304 · c9bbf8d2
Commit c9bbf8d2 authored Sep 28, 2021 by Philipp Bucher Committed by Henry Schreiner Sep 28, 2021
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docs/compiling.rst
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--- a/docs/compiling.rst
+++ b/docs/compiling.rst
@@ -340,7 +340,7 @@ standard explicitly with

    set(CMAKE_CXX_STANDARD 14 CACHE STRING "C++ version selection")  # or 11, 14, 17, 20
    set(CMAKE_CXX_STANDARD_REQUIRED ON)  # optional, ensure standard is supported
-    set(CMAKE_CXX_EXTENSIONS OFF)  # optional, keep compiler extensionsn off
+    set(CMAKE_CXX_EXTENSIONS OFF)  # optional, keep compiler extensions off

 The variables can also be set when calling CMake from the command line using
 the ``-D<variable>=<value>`` flag. You can also manually set ``CXX_STANDARD``