diff --git a/src/2_coordinates.md b/src/2_coordinates.md
index 4d946fa88550e9bbe169bdc6cc45daff9373bbac..5998967b602c045053e7b88221cf2a7d00c051bb 100644
--- a/src/2_coordinates.md
+++ b/src/2_coordinates.md
@@ -359,7 +359,6 @@ We have discussed four different coordinate systems:
     $${\bf r} = (r, \phi).$$ This system can be used in two
     dimensions. It is particularly suitable for systems with circular symmetry or functions
     given in terms of these coordinates.
-
     Infinitesimal distance: $$ds^2 = dr^2 + r^2 d\phi^2.$$
     Infinitesimal area: $$dA = r dr d\varphi.$$
 
@@ -367,7 +366,6 @@ We have discussed four different coordinate systems:
     $${\bf r} = (r, \phi, z).$$ This system can be
     used in three dimensions. It is particularly suitable for systems with axial symmetry
     or functions given in terms of these coordinates.
-
     Infinitesimal distance: $$ds^2 = dr^2 + r^2 d\phi^2 + dz^2.$$
     Infinitesimal volume:: $$dV = r dr d\varphi dz.$$
 
@@ -375,7 +373,6 @@ We have discussed four different coordinate systems:
     $${\bf r} = (r, \theta, \phi).$$ This sysytem can be
     used in three dimensions. It is particularly suitable for systems with spherical
     symmetry or functions given in terms of these coordinates.
-
     Infinitesimal distance:
     $$ds^2 =r^2 (\sin^2 \theta d\phi^2 + d\theta^2) +  dr^2 .$$
     Infinitesimal volume: