Change license, add Makefile, add image caching control

1 files changed, 2 insertions, 1 deletions

diff --git a/source/know/concept/self-phase-modulation/index.md b/source/know/concept/self-phase-modulation/index.md
index 931e10b..bc5a103 100644
--- a/source/know/concept/self-phase-modulation/index.md
+++ b/source/know/concept/self-phase-modulation/index.md
@@ -69,7 +69,8 @@ $$\begin{aligned}
     A(z, t) = \sqrt{P_0} \exp\!\Big(\!-\!\frac{t^2}{2 T_0^2}\Big) \exp\!\bigg( i \gamma z P_0 \exp\!\Big(\!-\!\frac{t^2}{T_0^2}\Big) \bigg)
 \end{aligned}$$
 
-{% include image.html file="simulation-full.png" width="100%" alt="Self-phase modulation simulation results" %}
+{% include image.html file="simulation-full.png" width="100%"
+    alt="Self-phase modulation simulation results" %}
 
 The **instantaneous frequency** $$\omega_\mathrm{SPM}(z, t)$$,
 which describes the dominant angular frequency at a given point in the time domain,