Fix "infix modifier required" errors in project

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt

@@ -103,8 +103,8 @@ abstract class CompletionSession(
     protected val bindingContext = resolutionFacade.analyze(position.parentsWithSelf.firstIsInstance<KtElement>(), BodyResolveMode.PARTIAL_FOR_COMPLETION)
     protected val inDescriptor = position.getResolutionScope(bindingContext, resolutionFacade).ownerDescriptor
 
-    private val kotlinIdentifierStartPattern = StandardPatterns.character().javaIdentifierStart() andNot singleCharPattern('$')
-    private val kotlinIdentifierPartPattern = StandardPatterns.character().javaIdentifierPart() andNot singleCharPattern('$')
+    private val kotlinIdentifierStartPattern = StandardPatterns.character().javaIdentifierStart().andNot(singleCharPattern('$'))
+    private val kotlinIdentifierPartPattern = StandardPatterns.character().javaIdentifierPart().andNot(singleCharPattern('$'))
 
     protected val prefix = CompletionUtil.findIdentifierPrefix(
             parameters.getPosition().getContainingFile(),
@@ -123,7 +123,7 @@ abstract class CompletionSession(
             nameFilter
     }
 
-    private fun ((Name) -> Boolean).or(otherFilter: (Name) -> Boolean): (Name) -> Boolean
+    private infix fun ((Name) -> Boolean).or(otherFilter: (Name) -> Boolean): (Name) -> Boolean
             = { this(it) || otherFilter(it) }
 
     protected val isVisibleFilter: (DeclarationDescriptor) -> Boolean = { isVisibleDescriptor(it, completeNonAccessible = configuration.completeNonAccessibleDeclarations) }

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionUtils.kt

@@ -345,9 +345,9 @@ fun shortenReferences(context: InsertionContext, startOffset: Int, endOffset: In
     ShortenReferences.DEFAULT.process(context.file as KtFile, startOffset, endOffset)
 }
 
-fun <T> ElementPattern<T>.and(rhs: ElementPattern<T>) = StandardPatterns.and(this, rhs)
+infix fun <T> ElementPattern<T>.and(rhs: ElementPattern<T>) = StandardPatterns.and(this, rhs)
 fun <T> ElementPattern<T>.andNot(rhs: ElementPattern<T>) = StandardPatterns.and(this, StandardPatterns.not(rhs))
-fun <T> ElementPattern<T>.or(rhs: ElementPattern<T>) = StandardPatterns.or(this, rhs)
+infix fun <T> ElementPattern<T>.or(rhs: ElementPattern<T>) = StandardPatterns.or(this, rhs)
 
 fun singleCharPattern(char: Char) = StandardPatterns.character().equalTo(char)
 

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/KotlinCompletionContributor.kt

@@ -215,7 +215,7 @@ public class KotlinCompletionContributor : CompletionContributor() {
                 if (tokenType == KtTokens.FUN_KEYWORD) {
                     tail += "()"
                 }
-                builder append tail
+                builder.append(tail)
 
                 val text = builder.toString()
                 val file = KtPsiFactory(tokenBefore.getProject()).createFile(text)