Merge pull request #360 from Artoria2e5/patch-3

Fix pgmspace.h link for PROGMEM again

Author: robsoncouto

Language/Variables/Utilities/PROGMEM.adoc

@@ -21,7 +21,7 @@ Store data in flash (program) memory instead of SRAM. There's a description of t
 
 The `PROGMEM` keyword is a variable modifier, it should be used only with the datatypes defined in pgmspace.h. It tells the compiler "put this information into flash memory", instead of into SRAM, where it would normally go.
 
-PROGMEM is part of the link:http://www.nongnu.org/avr-libc/user-manual/group__avr__pgmspace.html[pgmspace.h] library. It is included automatically in modern versions of the IDE, however if you are using an IDE version below 1.0 (2011), you'll first need to include the library at the top your sketch, like this:
+PROGMEM is part of the link:http://www.nongnu.org/avr-libc/user-manual/group\__avr__pgmspace.html[pgmspace.h] library. It is included automatically in modern versions of the IDE, however if you are using an IDE version below 1.0 (2011), you'll first need to include the library at the top your sketch, like this:
 
 `#include <avr/pgmspace.h>`
 [%hardbreaks]
@@ -44,7 +44,7 @@ Note that because PROGMEM is a variable modifier, there is no hard and fast rule
 
 While `PROGMEM` could be used on a single variable, it is really only worth the fuss if you have a larger block of data that needs to be stored, which is usually easiest in an array, (or another C data structure beyond our present discussion).
 
-Using `PROGMEM` is also a two-step procedure. After getting the data into Flash memory, it requires special methods (functions), also defined in the link:http://www.nongnu.org/avr-libc/user-manual/group__avr__pgmspace.html[pgmspace.h] library, to read the data from program memory back into SRAM, so we can do something useful with it.
+Using `PROGMEM` is also a two-step procedure. After getting the data into Flash memory, it requires special methods (functions), also defined in the link:http://www.nongnu.org/avr-libc/user-manual/group\__avr__pgmspace.html[pgmspace.h] library, to read the data from program memory back into SRAM, so we can do something useful with it.
 
 
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