diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 33814e8..ec02b7f 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -10,7 +10,7 @@ plugins {
     jacoco
     id("com.github.sakata1222.jacoco-markdown") version "1.4.0"
     pmd
-    id("org.sonarqube") version "4.4.1.3373"
+    //id("org.sonarqube") version "4.4.1.3373"
 }
 
 repositories {
@@ -85,7 +85,7 @@ pmd {
     rulesMinimumPriority = 5
     ruleSets = listOf("category/java/errorprone.xml", "category/java/bestpractices.xml")
 }
-
+/*
 sonar {
   properties {
     property("sonar.projectKey", "The-Lum_ASCIIMathTeXImg")
@@ -94,3 +94,4 @@ sonar {
     property("sonar.coverage.jacoco.xmlReportPaths", "reports/jacoco/test/jacocoTestReport.xml")
   }
 }
+*/
\ No newline at end of file
diff --git a/app/src/main/java/math/ASCIIMathTeXImg.java b/app/src/main/java/math/ASCIIMathTeXImg.java
index 6e70952..3ba9080 100644
--- a/app/src/main/java/math/ASCIIMathTeXImg.java
+++ b/app/src/main/java/math/ASCIIMathTeXImg.java
@@ -659,14 +659,20 @@ else if (symbol == AMquote)
 				i = 0;
 			if (i == -1)
 				i = str.length();
-			st = str.substring(1, i);
-			if (st.charAt(0) == ' ') {
-				newFrag = "\\ ";
-			}
-			newFrag += "\\text{" + st + "}";
-			if (st.charAt(st.length() - 1) == ' ') {
-				newFrag += "\\ ";
+			if (i == 0) {
+				newFrag = "\\text{" + str.charAt(0) + "}";
+			} else {
+				st = str.substring(1, i);
+				if (st.charAt(0) == ' ') {
+					newFrag = "\\ ";
+				}
+				newFrag += "\\text{" + st + "}";
+				if (st.charAt(st.length() - 1) == ' ') {
+					newFrag += "\\ ";
+				}
 			}
+			if (i == str.length())
+				i = i - 1;
 			str = AMremoveCharsAndBlanks(str, i + 1);
 			return new String[] { newFrag, str };
 
diff --git a/app/src/test/java/math/UnitTestGen.java b/app/src/test/java/math/UnitTestGen.java
index 140434d..d7f0941 100644
--- a/app/src/test/java/math/UnitTestGen.java
+++ b/app/src/test/java/math/UnitTestGen.java
@@ -506,6 +506,20 @@ static void initAll() {
 		"2^+3",
 		"/4",
 		"lim_(x rarr 2^-) f(x)",
+
+// new tests for code coverage
+		"text(f)",
+		"text({f})",
+		"text([f])",
+		"text(  a)",
+		"text(  a  )",
+		"text<a>",
+		"text<a >",
+		"text{f}",
+		"text[f]",
+		"text{f",
+		"text[f",
+		"text{f abc",
 	})
 	void test(String input) {
 		final String res = cut.getTeX(input);
diff --git a/docs/jacocoSummary.md b/docs/jacocoSummary.md
index 0d31da0..3f778cc 100644
--- a/docs/jacocoSummary.md
+++ b/docs/jacocoSummary.md
@@ -1,11 +1,11 @@
-|Type       |        Missed/Total|        Coverage|
-|:---       |                ---:|            ---:|
-|INSTRUCTION|~~199/6126~~ 98/6127|~~96.75~~ 98.40%|
-|BRANCH     |   ~~63/353~~ 47/353|~~82.15~~ 86.69%|
-|LINE       |   ~~25/408~~ 17/408|~~93.87~~ 95.83%|
+|Type       |       Missed/Total|        Coverage|
+|:---       |               ---:|            ---:|
+|INSTRUCTION|~~98/6127~~ 78/6143|~~98.40~~ 98.73%|
+|BRANCH     |  ~~47/353~~ 41/357|~~86.69~~ 88.52%|
+|LINE       |  ~~17/408~~ 11/412|~~95.83~~ 97.33%|
 
 Class list with less coverage (Worst 5)
 
 |Class               |Instructions(C0)|  Branches(C1)|
 |:---                |            ---:|          ---:|
-|math.ASCIIMathTeXImg| 98/6063(98.38%)|47/353(86.69%)|
+|math.ASCIIMathTeXImg| 78/6079(98.72%)|41/357(88.52%)|