Added folding support for functions and macro definitions.

src/test/java/de/platon42/intellij/plugins/m68k/folding/M68kFoldingBuilderTest.kt

@@ -0,0 +1,19 @@
+package de.platon42.intellij.plugins.m68k.folding
+
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import de.platon42.intellij.jupiter.LightCodeInsightExtension
+import de.platon42.intellij.jupiter.MyFixture
+import de.platon42.intellij.jupiter.TestDataPath
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+
+@TestDataPath("src/test/resources/folding")
+@ExtendWith(LightCodeInsightExtension::class)
+internal class M68kFoldingBuilderTest {
+
+    @Test
+    internal fun check_documentation_for_a_symbol_definition(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.testFolding(myFixture.testDataPath + "/folding.asm")
+    }
+}

src/test/resources/folding/folding.asm

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+; this is a test
+
+FOO = 1
+<fold text='[[[ demo_main ]]]'>; this is the main demo routine
+demo_main:
+        moveq.l #0,d0
+        rts
+
+; data area starts here
+.data   dc.w    10,0
+        even</fold>
+
+; this is an unrelated comment
+
+<fold text='[[[ intro_part1 ]]]'>; this is another folding area
+; could be anything.
+
+intro_part1
+        dc.w    $47fe
+        illegal
+        rts</fold>
+
+; this comment is two lines away
+
+
+<fold text='[[[ intro_part2 ]]]'>intro_part2:
+        moveq.l #0,d1
+        rts</fold>
+
+; standard macros
+<fold text='[[[ MACRO BLTWAIT ]]]'>BLTWAIT MACRO
+.bw\@
+        btst	#DMAB_BLTDONE-8,dmaconr(a5)
+        bne.s	.bw\@
+        ENDM</fold>
+
+********************** foobar
+
+
+<fold text='[[[ some_more_data ]]]'>some_more_data:
+        dc.w    $123
+        dc.w    $345
+        dc.w    $333
+        dc.w    $222</fold>
+
+CUBE_SIZE = 100