Fix slash issue in HTTP URI

See #85

Author: spitzerd

src/main/kotlin/org/bsplines/ltexls/languagetool/LanguageToolHttpInterface.kt

@@ -42,7 +42,11 @@ class LanguageToolHttpInterface(
     var exception: Exception? = null
     this.uri =
       try {
-        URI(uriString + "/v2/check").toURL().toURI()
+        if (uriString.last().toString() == "/") {
+          URI(uriString + "v2/check").toURL().toURI()
+        } else {
+          URI(uriString + "/v2/check").toURL().toURI()
+        }
       } catch (e: MalformedURLException) {
         exception = e
         null
@@ -56,6 +60,8 @@ class LanguageToolHttpInterface(
     }
   }
 
+  fun getURIString(): String = this.uri.toString()
+
   override fun isInitialized(): Boolean = (this.uri != null)
 
   override fun checkInternal(

src/test/kotlin/org/bsplines/ltexls/languagetool/LanguageToolHttpInterfaceTest.kt

@@ -45,7 +45,16 @@ class LanguageToolHttpInterfaceTest {
 
   @Test
   fun testConstructor() {
+    assertTrue(LanguageToolHttpInterface("http://localhost:8081", "en-US", "").isInitialized())
     assertTrue(LanguageToolHttpInterface("http://localhost:8081/", "en-US", "").isInitialized())
+    assertTrue(
+      LanguageToolHttpInterface("http://localhost:8081/", "en-US", "").getURIString() ==
+        "http://localhost:8081/v2/check",
+    )
+    assertTrue(
+      LanguageToolHttpInterface("http://localhost:8081", "en-US", "").getURIString() ==
+        "http://localhost:8081/v2/check",
+    )
     assertFalse(LanguageToolHttpInterface("http://localhost:80:81/", "en-US", "").isInitialized())
   }