Merge pull request #5447 from dearblue/tab

Extend the tab with 8 whitespace

doc/guides/compile.md

@@ -379,7 +379,8 @@ end
 During the build process the directory `build` will be created in the
 root directory. The structure of this directory will look like this:
 
-	+- build
+```
++- build
     |
     +- host
         |
@@ -396,6 +397,7 @@ root directory. The structure of this directory will look like this:
         +- mrblib       <- Compilation result from mrblib
         |
         +- src          <- Compilation result from C sources
+```
 
 The compilation workflow will look like this:
 
@@ -425,7 +427,8 @@ The compilation workflow will look like this:
 In case of a cross-compilation to `i386` the `build` directory structure looks
 like this:
 
-	+- build
+```
++- build
     |
     +- host
     |   |
@@ -450,6 +453,7 @@ like this:
         +- mrblib
         |
         +- src
+```
 
 An extra directory is created for the target platform. In case you
 compile for `i386` a directory called `i386` is created under the

doc/guides/mrbgems.md

@@ -297,7 +297,8 @@ mrb_c_extension_example_gem_final(mrb_state* mrb) {
 
 ### Example
 
-	+- c_extension_example/
+```
++- c_extension_example/
     |
     +- README.md        (Optional)
     |
@@ -310,6 +311,7 @@ mrb_c_extension_example_gem_final(mrb_state* mrb) {
     |   +- example.rb   <- Test code for C extension
     |
     +- mrbgem.rake      <- GEM specification
+```
 
 ## Ruby Extension
 
@@ -323,7 +325,8 @@ none
 
 ### Example
 
-	+- ruby_extension_example/
+```
++- ruby_extension_example/
     |
     +- README.md        (Optional)
     |
@@ -336,6 +339,7 @@ none
     |   +- example.rb   <- Test code for Ruby extension
     |
     +- mrbgem.rake      <- GEM specification
+```
 
 ## C and Ruby Extension
 
@@ -353,7 +357,8 @@ See C and Ruby example.
 
 ### Example
 
-	+- c_and_ruby_extension_example/
+```
++- c_and_ruby_extension_example/
     |
     +- README.md        (Optional)
     |
@@ -370,6 +375,7 @@ See C and Ruby example.
     |   +- example.rb   <- Test code for C and Ruby extension
     |
     +- mrbgem.rake      <- GEM specification
+```
 
 ## Binary gems
 
@@ -389,7 +395,7 @@ binary gems, to separate normal gems and binary gems.
 ### Example
 
 ```
- +- mruby-bin-example/
++- mruby-bin-example/
     |
     +- README.md        (Optional)
     |