Fix Java doxygen:notranslate for single line comments

Remove extra generated line

Examples/test-suite/doxygen_basic_notranslate.i

@@ -2,6 +2,7 @@
 
 %include "doxygen_basic_translate.h"
 %feature("doxygen:notranslate") function;
+%feature("doxygen:notranslate") function1;
 %feature("doxygen:notranslate") function2;
 %feature("doxygen:notranslate") function3;
 %feature("doxygen:notranslate") function4;
@@ -25,6 +26,11 @@ int function()
     return 0;
 }
 
+/** Single line comment */
+void function1()
+{
+}
+
 /**
  * A test of a very very very very very very very very very very very very very very very very
  * very very very very very long comment string.

Examples/test-suite/java/doxygen_basic_notranslate_runme.java

@@ -61,8 +61,7 @@ public class doxygen_basic_notranslate_runme {
     		"  \n" +
     		"");
     wantedComments.put("doxygen_basic_notranslate.doxygen_basic_notranslate.function5(int)",
-    		"  This is a post comment. \n" +
+    		"  This is a post comment. ");
-    		"");
     wantedComments.put("doxygen_basic_notranslate.doxygen_basic_notranslate.function7(doxygen_basic_notranslate.SWIGTYPE_p_p_p_Shape)",
     		" \n" +
     		"  Test for a parameter with difficult type\n" +
@@ -88,6 +87,8 @@ public class doxygen_basic_notranslate_runme {
     		"  @param a Some parameter, default is 42\n" +
     		"  \n" +
     		"");
+    wantedComments.put("doxygen_basic_notranslate.doxygen_basic_notranslate.function1()",
+    		"  Single line comment ");
     wantedComments.put("doxygen_basic_notranslate.doxygen_basic_notranslate.function2()",
     		" \n" +
     		"  A test of a very very very very very very very very very very very very very very very very\n" +
@@ -98,4 +99,4 @@ public class doxygen_basic_notranslate_runme {
     // and ask the parser to check comments for us
     System.exit(parser.check(wantedComments));
   }
-}
+}

Examples/test-suite/python/doxygen_basic_notranslate_runme.py

@@ -14,6 +14,9 @@ The comment text
 \sa function2"""
 )
 
+comment_verifier.check(inspect.getdoc(doxygen_basic_notranslate.function1),
+    r"""Single line comment """
+)
 comment_verifier.check(inspect.getdoc(doxygen_basic_notranslate.function2),
     r"""A test of a very very very very very very very very very very very very very very very very
 very very very very very long comment string."""

Source/Doxygen/javadoc.cxx

@@ -718,10 +718,12 @@ std::string JavaDocConverter::indentAndInsertAsterisks(const string &doc) {
 
   size_t idx = doc.find('\n');
   size_t indent = 0;
+  bool singleLineComment = idx == string::npos;
   // Detect indentation.
   //   The first line in comment is the one after '/**', which may be
   //   spaces and '\n' or the text. In any case it is not suitable to detect
   //   indentation, so we have to skip the first '\n'.
+  //   However, if there is just one line, then use that line to detect indentation.
   if (idx != string::npos) {
     size_t nonspaceIdx = doc.find_first_not_of(" \t", idx + 1);
     if (nonspaceIdx != string::npos) {
@@ -767,7 +769,8 @@ std::string JavaDocConverter::indentAndInsertAsterisks(const string &doc) {
   size_t nonspaceEndIdx = translatedStr.find_last_not_of(" \t");
   if (nonspaceEndIdx != string::npos) {
     if (translatedStr[nonspaceEndIdx] != '\n') {
-      translatedStr += '\n';
+      if (!singleLineComment)
+	translatedStr += '\n';
     } else {
       // remove trailing spaces
       translatedStr = translatedStr.substr(0, nonspaceEndIdx + 1);