Revert "Improve suffix pattern check"

This reverts commit 3474afb165.

Unfortunately this change is likely to cause issues for applications
that use regular expressions in a URI variable. I think we will have
to leave at: if there are any dots in the last segment of the
request path, regardless of whether they're in a URI var or not,
the suffix pattern match is off.

Issue: SPR-11532

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java

@@ -249,7 +249,8 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 				}
 			}
 			else {
-				if (!hasSuffix(pattern) && this.pathMatcher.match(pattern + ".*", lookupPath)) {
+				boolean hasSuffix = pattern.indexOf('.') != -1;
+				if (!hasSuffix && this.pathMatcher.match(pattern + ".*", lookupPath)) {
 					return pattern + ".*";
 				}
 			}
@@ -265,28 +266,6 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 		return null;
 	}
 
-	private boolean hasSuffix(String pattern) {
-		boolean uriVarMode = false;
-		for (int i = pattern.length(); i > 0; i--) {
-			char c = pattern.charAt(i-1);
-			if (c == '}') {
-				uriVarMode = true;
-			}
-			else if (c == '{') {
-				uriVarMode = false;
-			}
-			else if (c == '/') {
-				return false;
-			}
-			else {
-				if (!uriVarMode && c == '.') {
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
 	/**
 	 * Compare the two conditions based on the URL patterns they contain.
 	 * Patterns are compared one at a time, from top to bottom via