README: undescore format for file naming

Author: TomasVotruba

README.md

@@ -9,8 +9,8 @@ Why refactor manually if Rector can handle 80% of the task for you?
 
 <br>
 
-- **[Overview of all 500+ Rectors](/docs/AllRectorsOverview.md)**
 - **[Online DEMO](https://getrector.org/demo)**
+- [Overview of all 500+ Rector Rules](/docs/rector_rules_overview.md)
 
 <br>
 
@@ -113,7 +113,7 @@ parameters:
 
 ### B. Standalone Rules
 
-In the end, it's best to combine few of basic sets and drop [particular rules](https://github.com/rectorphp/rector/blob/master/docs/AllRectorsOverview.md) that you want to try:
+In the end, it's best to combine few of basic sets and drop [particular rules](/docs/rector_rules_overview.md) that you want to try:
 
 ```yaml
 # rector.yaml
@@ -263,12 +263,12 @@ parameters:
 
 ## More Detailed Documentation
 
-- **[All Rectors Overview](/docs/AllRectorsOverview.md)**
-- [Create own Rector](/docs/create_own_rector.md)
-- [How Does Rector Work?](/docs/HowItWorks.md)
-- [PHP Parser Nodes Overview](/docs/NodesOverview.md)
-- [Generate Rector from Recipe](/docs/RectorRecipe.md)
-- [Add Checkstyle with your CI](/docs/Checkstyle.md)
+- **[All Rectors Overview](/docs/rector_rules_overview.md)**
+- [Create own Rule](/docs/create_own_rule.md)
+- [Generate Rector from Recipe](/docs/rector_recipe.md)
+- [How Does Rector Work?](/docs/how_it_works.md)
+- [PHP Parser Nodes Overview](/docs/nodes_overview.md)
+- [Add Checkstyle with your CI](/docs/checkstyle.md)
 
 ## How to Contribute
 

composer.json

@@ -267,12 +267,12 @@
             "vendor/bin/changelog-linker cleanup --ansi"
         ],
         "check-docs": [
-            "bin/rector dump-rectors | diff --ignore-space-change docs/AllRectorsOverview.md - ",
-            "bin/rector dump-nodes | diff --ignore-space-change docs/NodesOverview.md - "
+            "bin/rector dump-rectors | diff --ignore-space-change docs/rector_rules_overview.md - ",
+            "bin/rector dump-nodes | diff --ignore-space-change docs/nodes_overview.md - "
         ],
         "docs": [
-            "bin/rector dump-rectors > docs/AllRectorsOverview.md",
-            "bin/rector dump-nodes > docs/NodesOverview.md"
+            "bin/rector dump-rectors > docs/rector_rules_overview.md",
+            "bin/rector dump-nodes > docs/nodes_overview.md"
         ],
         "rector-ci": "bin/rector process --config rector-ci.yaml --dry-run --ansi",
         "rector": "bin/rector process --config rector-ci.yaml --ansi"

docs/Checkstyle.md docs/checkstyle.md

@@ -1,6 +1,6 @@
 # 3 Steps to Create Your Own Rector
 
-First, make sure it's not covered by [any existing Rectors](/docs/AllRectorsOverview.md).
+First, make sure it's not covered by [any existing Rectors](/docs/rector_rules_overview.md).
 
 Let's say we want to **change method calls from `set*` to `change*`**.