diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index e1f7538..5a544bd 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -18,3 +18,5 @@ d740c6ccced02147f84a39d5e5f0984d12bac6cb
 9ae7bdea966102f9621b22192747a891078e7470
 # Normalize white space in ChangeLog
 d7b909f97d3effc9540c35b0251bdf1c9abf187c
+# Remove 'this->'
+f5cac93ac63559ddc0aec1b1c61c9e2503c7b8e0
diff --git a/libqpdf/QPDFJob_argv.cc b/libqpdf/QPDFJob_argv.cc
index 9aeabc0..180a7a6 100644
--- a/libqpdf/QPDFJob_argv.cc
+++ b/libqpdf/QPDFJob_argv.cc
@@ -117,8 +117,10 @@ ArgParser::argZopfli()
             logger->info("Set the environment variable QPDF_ZOPFLI to activate.\n");
             logger->info("* QPDF_ZOPFLI=disabled or QPDF_ZOPFLI not set: don't use zopfli.\n");
             logger->info("* QPDF_ZOPFLI=force: use zopfli, and fail if not available.\n");
-            logger->info("* QPDF_ZOPFLI=silent: use zopfli if available and silently fall back if not.\n");
-            logger->info("* QPDF_ZOPFLI= any other value: use zopfli if available, and warn if not.\n");
+            logger->info(
+                "* QPDF_ZOPFLI=silent: use zopfli if available and silently fall back if not.\n");
+            logger->info(
+                "* QPDF_ZOPFLI= any other value: use zopfli if available, and warn if not.\n");
         }
     } else {
         logger->error("zopfli support is not enabled\n");
diff --git a/libqpdf/SF_FlateLzwDecode.cc b/libqpdf/SF_FlateLzwDecode.cc
index b24ee5a..3be8dfc 100644
--- a/libqpdf/SF_FlateLzwDecode.cc
+++ b/libqpdf/SF_FlateLzwDecode.cc
@@ -7,17 +7,6 @@
 #include <qpdf/QIntC.hh>
 #include <qpdf/QTC.hh>
 
-SF_FlateLzwDecode::SF_FlateLzwDecode(bool lzw) :
-    lzw(lzw),
-    // Initialize values to their defaults as per the PDF spec
-    predictor(1),
-    columns(1),
-    colors(1),
-    bits_per_component(8),
-    early_code_change(true)
-{
-}
-
 bool
 SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
 {
@@ -32,14 +21,13 @@ SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
         if (key == "/Predictor") {
             if (value.isInteger()) {
                 predictor = value.getIntValueAsInt();
-                if (!((predictor == 1) || (predictor == 2) ||
-                      ((predictor >= 10) && (predictor <= 15)))) {
+                if (!(predictor == 1 || predictor == 2 || (predictor >= 10 && predictor <= 15))) {
                     filterable = false;
                 }
             } else {
                 filterable = false;
             }
-        } else if ((key == "/Columns") || (key == "/Colors") || (key == "/BitsPerComponent")) {
+        } else if (key == "/Columns" || key == "/Colors" || key == "/BitsPerComponent") {
             if (value.isInteger()) {
                 int val = value.getIntValueAsInt();
                 if (key == "/Columns") {
@@ -56,7 +44,7 @@ SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
             if (value.isInteger()) {
                 int earlychange = value.getIntValueAsInt();
                 early_code_change = (earlychange == 1);
-                if (!((earlychange == 0) || (earlychange == 1))) {
+                if (!(earlychange == 0 || earlychange == 1)) {
                     filterable = false;
                 }
             } else {
@@ -65,7 +53,7 @@ SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
         }
     }
 
-    if ((predictor > 1) && (columns == 0)) {
+    if (predictor > 1 && columns == 0) {
         filterable = false;
     }
 
@@ -76,7 +64,7 @@ Pipeline*
 SF_FlateLzwDecode::getDecodePipeline(Pipeline* next)
 {
     std::shared_ptr<Pipeline> pipeline;
-    if ((predictor >= 10) && (predictor <= 15)) {
+    if (predictor >= 10 && predictor <= 15) {
         QTC::TC("qpdf", "SF_FlateLzwDecode PNG filter");
         pipeline = std::make_shared<Pl_PNGFilter>(
             "png decode",
diff --git a/libqpdf/qpdf/SF_FlateLzwDecode.hh b/libqpdf/qpdf/SF_FlateLzwDecode.hh
index 203d893..4b70b50 100644
--- a/libqpdf/qpdf/SF_FlateLzwDecode.hh
+++ b/libqpdf/qpdf/SF_FlateLzwDecode.hh
@@ -5,25 +5,29 @@
 #ifndef SF_FLATELZWDECODE_HH
 # define SF_FLATELZWDECODE_HH
 
-class SF_FlateLzwDecode: public QPDFStreamFilter
+class SF_FlateLzwDecode final: public QPDFStreamFilter
 {
   public:
-    SF_FlateLzwDecode(bool lzw);
-    ~SF_FlateLzwDecode() override = default;
+    SF_FlateLzwDecode(bool lzw) :
+        lzw(lzw)
+    {
+    }
+    ~SF_FlateLzwDecode() final = default;
 
-    bool setDecodeParms(QPDFObjectHandle decode_parms) override;
-    Pipeline* getDecodePipeline(Pipeline* next) override;
+    bool setDecodeParms(QPDFObjectHandle decode_parms) final;
+    Pipeline* getDecodePipeline(Pipeline* next) final;
 
     static std::shared_ptr<QPDFStreamFilter> flate_factory();
     static std::shared_ptr<QPDFStreamFilter> lzw_factory();
 
   private:
-    bool lzw;
-    int predictor;
-    int columns;
-    int colors;
-    int bits_per_component;
-    bool early_code_change;
+    bool lzw{};
+    // Defaults as per the PDF spec
+    int predictor{1};
+    int columns{1};
+    int colors{1};
+    int bits_per_component{8};
+    bool early_code_change{true};
     std::vector<std::shared_ptr<Pipeline>> pipelines;
 };