Improve suffix pattern check

After this change dots inside URI variables in a request mapping
pattern are ignored and no longer considered an indication that
the pattern contains a suffix itself.

Issue: SPR-11532

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

@@ -249,8 +249,7 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 				}
 			}
 			else {
-				boolean hasSuffix = pattern.indexOf('.') != -1;
-				if (!hasSuffix && this.pathMatcher.match(pattern + ".*", lookupPath)) {
+				if (!hasSuffix(pattern) && this.pathMatcher.match(pattern + ".*", lookupPath)) {
 					return pattern + ".*";
 				}
 			}
@@ -266,6 +265,28 @@ 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