diff --git a/demos/gtk-demo/constraints2.c b/demos/gtk-demo/constraints2.c
index 0e2502505a..01c898f24b 100644
--- a/demos/gtk-demo/constraints2.c
+++ b/demos/gtk-demo/constraints2.c
@@ -1,7 +1,7 @@
 /* Constraints/Interactive
  *
- * Demonstrate how constraints can be updates during
- * user interaction.
+ * Demonstrate how constraints can be updates during user interaction.
+ * The vertical edge between the buttons can be dragged with the mouse.
  */
 
 #include <glib/gi18n.h>
diff --git a/demos/gtk-demo/cursors.c b/demos/gtk-demo/cursors.c
index 875179ddcb..d1ea0314e5 100644
--- a/demos/gtk-demo/cursors.c
+++ b/demos/gtk-demo/cursors.c
@@ -1,9 +1,8 @@
 /* Cursors
  *
- * Demonstrates a useful set of available cursors. The cursors shown here are the ones
- * defined by CSS, which we assume to be available.
- *
- * The example shows creating cursors by name or from an image, with or without a fallback.
+ * Demonstrates a useful set of available cursors. The cursors shown here are the
+ * ones defined by CSS, which we assume to be available. The example shows creating
+ * cursors by name or from an image, with or without a fallback.
  */
 
 #include <gtk/gtk.h>
diff --git a/demos/gtk-demo/flowbox.c b/demos/gtk-demo/flowbox.c
index 760923af88..4536160681 100644
--- a/demos/gtk-demo/flowbox.c
+++ b/demos/gtk-demo/flowbox.c
@@ -1,9 +1,8 @@
 /* Flow Box
  *
  * GtkFlowBox allows flexible and responsive grids which reflow
- * as needed and support sorting and filtering.
- *
- * The children of a GtkFlowBox are regular widgets
+ * as needed and support sorting and filtering. The children of
+ * a GtkFlowBox are regular widgets
  *
  * The dataset used here has 665 colors.
  */
diff --git a/demos/gtk-demo/listview_clocks.c b/demos/gtk-demo/listview_clocks.c
index ac020a7e34..fee60ebaf2 100644
--- a/demos/gtk-demo/listview_clocks.c
+++ b/demos/gtk-demo/listview_clocks.c
@@ -3,10 +3,9 @@
  * This demo displays the time in different timezones.
  *
  * The goal is to show how to set up expressions that track changes
- * in objects and make them update widgets.
- *
- * For that, we create a GtkClock object that updates its time every
- * second and then use various ways to display that time.
+ * in objects and make them update widgets. For that, we create a
+ * GtkClock object that updates its time every second and then use
+ * various ways to display that time.
  *
  * Typically, this will be done using GtkBuilder .ui files with the
  * help of the <binding> tag, but this demo shows the code that runs
diff --git a/demos/gtk-demo/listview_colors.c b/demos/gtk-demo/listview_colors.c
index 86132e34b6..68ccd80e27 100644
--- a/demos/gtk-demo/listview_colors.c
+++ b/demos/gtk-demo/listview_colors.c
@@ -6,7 +6,7 @@
  * and sort the data in various ways. The controls for
  * this are implemented using GtkDropDown.
  *
- * The dataset used here has 9283 items.
+ * The dataset used here has 9 283 items.
  */
 
 #include <gtk/gtk.h>
diff --git a/demos/gtk-demo/listview_weather.c b/demos/gtk-demo/listview_weather.c
index ed1ad24dfb..c373e43686 100644
--- a/demos/gtk-demo/listview_weather.c
+++ b/demos/gtk-demo/listview_weather.c
@@ -11,7 +11,7 @@
  * A GtkNoSelectionModel is used to make sure no item in the list can be
  * selected. All other interactions with the items is still possible.
  *
- * The dataset used here has 70000 items.
+ * The dataset used here has 70 000 items.
  */
 
 #include <gtk/gtk.h>