Editor/formatter configs: use whitespaces.

.clang-format

@@ -12,4 +12,4 @@ IndentWidth:     4
 PointerAlignment: Left
 Standard:        C++11
 TabWidth:        4
-UseTab:          ForIndentation
+UseTab:          Never

.editorconfig

 root = true
 
 [*]
-indent_style = tab
+indent_style = spaces
 insert_final_newline = true
 charset = utf-8
 trim_trailing_whitespace = true

.idea/codeStyleSettings.xml

@@ -9,7 +9,7 @@
             <option name="INDENT_SIZE" value="4" />
             <option name="CONTINUATION_INDENT_SIZE" value="8" />
             <option name="TAB_SIZE" value="4" />
-            <option name="USE_TAB_CHARACTER" value="true" />
+            <option name="USE_TAB_CHARACTER" value="false" />
             <option name="SMART_TABS" value="false" />
             <option name="LABEL_INDENT_SIZE" value="0" />
             <option name="LABEL_INDENT_ABSOLUTE" value="false" />
@@ -55,24 +55,24 @@
         </XML>
         <codeStyleSettings language="CMake">
           <indentOptions>
-            <option name="USE_TAB_CHARACTER" value="true" />
+            <option name="USE_TAB_CHARACTER" value="false" />
           </indentOptions>
         </codeStyleSettings>
         <codeStyleSettings language="ObjectiveC">
           <option name="CLASS_BRACE_STYLE" value="2" />
           <indentOptions>
             <option name="CONTINUATION_INDENT_SIZE" value="4" />
-            <option name="USE_TAB_CHARACTER" value="true" />
+            <option name="USE_TAB_CHARACTER" value="false" />
             <option name="SMART_TABS" value="true" />
           </indentOptions>
         </codeStyleSettings>
         <codeStyleSettings language="XML">
           <indentOptions>
-            <option name="USE_TAB_CHARACTER" value="true" />
+            <option name="USE_TAB_CHARACTER" value="false" />
           </indentOptions>
         </codeStyleSettings>
       </value>
     </option>
     <option name="USE_PER_PROJECT_SETTINGS" value="true" />
   </component>
-</project>
\ No newline at end of file
+</project>

scripts/style/uncrustify.cfg

@@ -96,7 +96,7 @@ input_tab_size=4
 code_width=100
 nl_max=2
 mod_add_long_ifdef_else_comment=10
-indent_with_tabs=1
+indent_with_tabs=0
 sp_arith=add
 sp_assign=add
 sp_enum_assign=add
@@ -120,4 +120,4 @@ mod_full_brace_for=remove
 mod_full_brace_if=remove
 mod_full_brace_while=remove
 mod_paren_on_return=remove
-pp_indent=remove
\ No newline at end of file
+pp_indent=remove